C++ (Cpp) pcpu_chunk_populated Examples

Example #1

File: percpu-km.c Project: AlexShiLucky/linux

static struct pcpu_chunk *pcpu_create_chunk(gfp_t gfp)
{
	const int nr_pages = pcpu_group_sizes[0] >> PAGE_SHIFT;
	struct pcpu_chunk *chunk;
	struct page *pages;
	unsigned long flags;
	int i;

	chunk = pcpu_alloc_chunk(gfp);
	if (!chunk)
		return NULL;

	pages = alloc_pages(gfp, order_base_2(nr_pages));
	if (!pages) {
		pcpu_free_chunk(chunk);
		return NULL;
	}

	for (i = 0; i < nr_pages; i++)
		pcpu_set_page_chunk(nth_page(pages, i), chunk);

	chunk->data = pages;
	chunk->base_addr = page_address(pages) - pcpu_group_offsets[0];

	spin_lock_irqsave(&pcpu_lock, flags);
	pcpu_chunk_populated(chunk, 0, nr_pages, false);
	spin_unlock_irqrestore(&pcpu_lock, flags);

	pcpu_stats_chunk_alloc();
	trace_percpu_create_chunk(chunk->base_addr);

	return chunk;
}

Example #2

File: percpu-km.c Project: 19Dan01/linux

static struct pcpu_chunk *pcpu_create_chunk(void)
{
	const int nr_pages = pcpu_group_sizes[0] >> PAGE_SHIFT;
	struct pcpu_chunk *chunk;
	struct page *pages;
	int i;

	chunk = pcpu_alloc_chunk();
	if (!chunk)
		return NULL;

	pages = alloc_pages(GFP_KERNEL, order_base_2(nr_pages));
	if (!pages) {
		pcpu_free_chunk(chunk);
		return NULL;
	}

	for (i = 0; i < nr_pages; i++)
		pcpu_set_page_chunk(nth_page(pages, i), chunk);

	chunk->data = pages;
	chunk->base_addr = page_address(pages) - pcpu_group_offsets[0];

	spin_lock_irq(&pcpu_lock);
	pcpu_chunk_populated(chunk, 0, nr_pages);
	spin_unlock_irq(&pcpu_lock);

	return chunk;
}